General description of polyelectrolyte/surfactant spread films - 1 day of missing data on PEI/SDS films required to publish

Polyelectrolyte/surfactant (P/S) films spread from the dissociation of aggregates at the air/water interface offer an efficient and robust way to develop new transfer applications. Poly(ethylene imine)/sodium dodecyl sulfate spread films exhibit distinct interfacial stoichiometries that can be controlled by the solution pH. We have studied this system on FIGARO and INTER using neutron reflectometry but are missing some data and critical repeats to go ahead with publication. An underlying reason is the presence of isotope effects, a topic often neglected and strongly in need of more insight by both the soft matter and neutron communities. Provision of 1 day on INTER would allow us to publish a benchmark paper delivering a global overview of spread P/S films with respect to the film compression, aggregate charge used in film preparation, and polyelectrolyte architecture and charge density.聚电解质/表面活性剂（P/S）薄膜可通过在气/液界面解离聚集体后铺展制得，为开发新型转移应用提供了高效且稳定的途径。聚乙烯亚胺/十二烷基硫酸钠铺展薄膜展现出可通过溶液pH调控的独特界面化学计量比。我们已借助FIGARO与INTER两台装置，利用中子反射法（neutron reflectometry）对该体系开展了研究，但目前仍缺失部分实验数据与关键重复测试，无法推进论文发表。究其核心原因，在于同位素效应（isotope effects）的存在——这一议题常被学界忽视，亟需软物质（soft matter）与中子研究领域开展更深入的探索。若能在INTER装置上获得1天的机时，我们便可发表一篇基准性论文，全面综述铺展型P/S薄膜的相关特性，涵盖薄膜压缩过程、薄膜制备所用聚集体电荷，以及聚电解质结构与电荷密度等内容。